Don't worry! Execute the following command in your system
ls /dev/tty* and paste here the output.
In your system you have one script that his names is
apm.sh. Use this script to launch the binary, if not, you can launch manually using:
sudo ./ArduCopter.elf -A udp:10.0.0.2:6000 -B /dev/ttyS0 -C /dev/ttyUSB0